The cryptographic signature guarantees the file is safe to install and was not tampered
with in any way.

* Improved support for ad-free purchases, and helpful error messaging when re-installing the app causes ads to re-appear.
* Fixes a few bugs and crashes.

If you rely on Speedtest to diagnose connectivity issues and keep your internet service provider and carriers honest, we'd be thrilled if you would leave us some feedback on Google Play. Thanks and happy testing!